Dr David Martin is a good one to listening to because most of what he says is based on filed patents over the years. He could literally be sued into oblivion if defaming someone by lying. His credentials are impeccable. Still though you still have to separate what is known fact he presents with indisputable evidence and those moments of giving personal opinion. Opinions though do boil down to that question of trusting what an individual says, if they gain your trust by sticking their neck out it'll go a bit further than believing people who don't have a shred of evidence to back up anything they say.
Dr Peter McCullough is another one. He does tend to show up on Fox News and be asked his opinion but his face clearly shows he's disgruntled to the fact that his opinion is limited to the scope of what Fox News wants people to hear, it will be the truth...which Fox only wants when it fits their narrative, but like I said it's pretty evident he's not allowed to tell all the truths he'd like to if given an opportunity.
If it makes it all the way through the world court, where the paperwork has already been filed both of them will be testifying before the court if called on the case of crimes against humanity.